Electrical heater for hot-water bags.



PATENTED JULY 30, 1907. G. VAN D. HILL. ELECTRICAL HEATER FOR HOT WATER BAGS.

APPLIOATION FILED SEPT.15,1906.

CHARLES VAN DYKE HILL, on ST. LOUIS, MISSOURI.

ELECTRICAL HEATER FOR HOT-WATER BAGS.

r Specification of Letters Patent.

Application filed September 15. 1906. Serial No. 834,701-

Patented July 30, 1907.

To all whom it concern:

Be it known that I, Crisntns VAN DYKE HILL, a citizen of the United States of America, residing in the city of St.Louis, in the State of Missouri, have invented certain new and useful Improvements in Electrical Heaters for Hot-Water Bags, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification. i I

My invention relates to an electrical heater for use in hot water bags for the purpose of heating the water therein or maintaining the water in a heated-condition after it has been heated and introduced into the bags, the invention having for its object to provide an extremely simple. and efiicient heater in which a core member for the resistance wire is dispensed with, the resistance wire being introduced loosely into a receiving shell and being surrounded by heat absorbing'and radiating material that is packed around the resistance .wire within the receiving shell.

Figure I is "a side elevation of a hot water bag partly broken out and my electrical heater in position in said bag. Fig; II is an enlarged longitudinal section taken through the upper end of the hot water bag, and the electrical heater on line II-II, Fig. I. Fig. III is an enlarged cross section taken through the electrical heater shell, the insulated resistance wire and the packing therein.

A designates a hot water bag of ordinary type which is provided with a mouth B and a neck 0. Located in the neck of the Bag is the usual threaded bushing D having an inturned annular flange E at its lower end that supports a gasket F.

G is a hollow threaded stopper that is seated in the bushing D and is provided with a perforated cap H-.

1 designatesashell that is closed at its lower end and open at its upper end, this shell being adapted to be seated in the hollow stopperG and seat against the lower side of the stopper cap H.

2 designates a resistance wire that is laid loosel in the shell 1, the said wire being insulated throughout its extent in any suitable manner, such'for instance, as by the Wrapping of silk thread thereon in order that all portions of the wire may be insulated from each other ,with the object in view of preventing short circuiting of the electrical current passed through the wire. The resistance wire is preferably folded into folds of approximately uniform length before it is introduced into the shell 1.

3 designates packing that is introduced into the lower end of the shell 1 and also packed around the resistance wire from the bottom of the shell to a point near the upper end of said shell. This packing is of heat radiating substance, such for instance, as sand and when it is introduced into the shell 1 it serves to relivered to the resistance wire of the heater. The cords 4 are united bya knot 5 after being passed through perforations in the stopper cap H of the hot water bag and this knot is located within the open upper end of the heater shell 1, in order that it may serve to prevent the withdrawal of the terminals of the cords from said shell and avoid the subjection. of the resistance wire to strain or disruption ii the cords exterior of the water bag are subjected to strain. firmly embedding the knotted portions of the cords in the heater shell, I introduce into the open upper end of the shell and above the packing therein a packing 6 of asbestos or other suitable material which is thoroughly tamped into the shell before said shell is introduced into the' hollow stopper G.

The electrical heater herein described is of extremely eimple and inexpensive construction and one in the use of which a high degree of heating power. with a. minimum of expenditure of electrical energy may be established and maintained.

1. In an electrical heater for hot water bags, the combination of a bag stopper, a shell having an open upper end' and seated in said stopper, a resistance wire in said shell, and cords extending through said stopper and into said shell; said cords being united interior of said shell, substantially as set forth. a

2. In an electrical heater for hot water bags, the combination of a bagstopper, a shell seated in said stopper and having an open upper end, a resistance wire loosely positioned in said shell, cords extending through said stopper and united interior of said shell and having connection with said resistance wire, and a packing surrounding the united portions of said cords within said shell, substantially as set forth.

In an electrical heater for hot water bags, the combination of a bag stopper,- a shell having an open upper end and seated in said stopper a resistance wire in said shell, and cords extending through said stopper and into said shell; said cords being knotted together interior of said shell, substantially as set forth.

4. In an electrical heater for hot water bags, the combination of a bag stopper, a shell seated in said stopper and having an open upper end, a resistance wire loosely positioned in said shell, cords extending through said stopper and knotted interior of said shell and having connection with said resistance wire, and a packing surrounding the knotted portions of said cords within said shell, substantially as set forth.

CHAS. VAN DYKE HILL. In presence of- NnLLin V. ALEXANDER, BLANCIIE HOGAN.

For the purpose of 

